debate tonight prompted by a video of a 9-year-old girl at a gun range in Arizona learning to shoot a powerful automatic weapon. ABC's Clayton Sandell tells us what happened next. Reporter: The girl in this video is 9 years old. From the east coast with her family visiting a popular tourist attraction Monday near Las Vegas, a shooting range called bullets and burgers. Give me one shot. Reporter: The instructor, 39-year-old Charles Vacca switches the gun to full automatic. But when she fires, she loses control, accidently shooting Vacca B Vacca dead. It's like losing a brother. These aren't employees or associates. These are family. Reporter: The shooting is tragic lee similar to this one in 2008 when an 8-year-old boy fired an uzi, it recoiled, killing him. There's no federal law prohibiting children from shooting ranges. In Pennsylvania, one range we found kids have to be 12 or older. In California, 7. One Texas range allows kids do pull the trigger as young as six. Some firing ranges like the centennial gun club in Colorado say that is too young. We've chosen not to let a 9-year-old shoot in our club. Why? They're still developing. There's a strength issue, a maturity issue, competency issue. Reporter: Today we fired the same caliber bullet. You can see the kick. A powerful force that some firearms experts say may be too much for kids to handle. Clayton Sandell, ABC news, Denver.

This transcript has been automatically generated and may not be 100% accurate.

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